Willem Boumans new world record

My good friend Willem Bouman, writer of a book about mental calculation ( http://www.epsilon-uitgaven.nl/E89.php ) and one of the best mental calculators in the world was on a talk show.

He will try to set a new world record; mentally splitting a 5 digit number into the addition of 4 squares.

The show is in Dutch:


I saw that on tv yesterday. It was good seeing him share the world of calculation on tv. We could use more interest in the world of calculation here in NL and in mental arithmetic in general :slight_smile:

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So true. I asked him to visit this forum from time to time and tell us about his way of calculating.

Would be fun. He has not said yes yet.

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Some more media published about his new record world record: